Best intake upgrade for $50

Originally posted by iamsparticuz
I heard that the k&n air filters boost on average 5 hp, no more than 10. The site advertises as much as 15. Does anyone know the exact amount? and why is it that most people go the cold air intake route rather than the new air filter?

well I didn't do a dyno or anything, but I would guess 1-2 hp gain by just the filter and 3-4 hp total after I removed the resonator.